WO2021008036A1

WO2021008036A1 - Charging control device

Info

Publication number: WO2021008036A1
Application number: PCT/CN2019/118047
Authority: WO
Inventors: 周文杰; 邱佩服
Original assignee: 天佑电器（苏州）有限公司
Priority date: 2019-07-17
Filing date: 2019-11-13
Publication date: 2021-01-21
Also published as: CN212412788U

Abstract

A charging device, comprising: a first control module (2) and a first switch module (4) connected to the first control module (2). The first switch module (4) is connected to a charging terminal (6) and a battery pack (1). The first control module (2) may collect and obtain parameters of the battery pack (1), compare the parameters of the battery pack (1) with preset parameters, and implement charging control for the battery pack (1) by means of the first switch module (4) according to the result of comparison. The charging control device further comprises a second control module (3) and a second switch module (5) connected to the second control module (3). The second switch module (5) is connected in series to the first switch module (4). The second control module (3) may collect and obtain parameters of the battery pack (1), compare the parameters of the battery pack (1) with preset parameters, and implement charging control for the battery pack (1) by means of the second switch module (5) according to the result of comparison. The battery pack (1) may be effectively prevented from overcharging.

Description

Charge control device

Technical field

The utility model relates to the technical field of charging management, in particular to a charging control device.

Background technique

In order to prevent the household appliance from being continuously charged after the charging is completed, the battery pack in the household appliance is usually equipped with a charging control device. When the voltage of the battery pack reaches a preset voltage, the charging control device automatically terminates the charging of the battery pack.

Most of the existing charging control devices only have one set of charging control modules, such as a battery management chip. The battery management chip can not only monitor the total voltage of the battery pack in real time, but also monitor the cell voltage and temperature of the battery pack. However, when the acquisition part or the control part of the battery management chip fails, the charging control device cannot realize the function of monitoring whether the battery pack is overcharged, and the battery pack may still be overcharged.

Utility model content

The utility model aims to provide a charging control device which can avoid overcharging of a battery pack.

In order to solve the above technical problems, the technical solution adopted by the present utility model is as follows: A charging control device includes a first control module and a first switch module connected to the first control module, and the first switch module is connected to charging Terminal and battery pack, the first control module can collect the parameters of the battery pack, compare the parameters of the battery pack with preset parameters, and according to the comparison result, realize the pairing through the first switch module For charging control of the battery pack, the charging control device further includes a second control module and a second switch module connected to the second control module, the second switch module is connected in series with the first switch module, so The second control module can collect and obtain the parameters of the battery pack, compare the parameters of the battery pack with the preset parameters, and according to the comparison result, realize the control of the battery pack through the second switch module Charge control.

Further, the first control module includes an acquisition circuit and a first control circuit, the acquisition circuit can acquire parameters of the battery pack, and the first control circuit can compare the parameters of the battery pack with the preset Set the parameters for comparison and generate the first set of control signals.

Further, the first control module includes a battery management chip, the battery management chip can collect parameters of the battery pack, compare the parameters of the battery pack with the preset parameters, and generate a first set control signal.

Further, the second control module includes a single-chip microcomputer, and the single-chip microcomputer can collect the total voltage of the battery pack, compare the total voltage of the battery pack with the preset total voltage in the preset parameters, and generate a third group control signal.

Further, the first set of control signals includes at least a first charging control signal and a second charging control signal; when the parameter of the battery pack is not greater than the preset parameter, the battery management chip generates the first Charge control signal, and realize the path of the first switch module according to the first charge control signal; when the parameter of the battery pack is greater than the preset parameter, the battery management chip generates the second charge control Signal, and realize the disconnection of the first switch module according to the second charging control signal.

Further, the third group of control signals includes at least a third charging control signal and a fourth charging control signal; when the total voltage of the battery group is not greater than the preset total voltage, the single-chip microcomputer generates the third Charge control signal, and realize the path of the second switch module according to the third charge control signal; when the total voltage of the battery pack is greater than the preset total voltage, the single-chip microcomputer generates the fourth charge control Signal and realize the disconnection of the second switch module according to the fourth charging control signal.

Further, the first control module is connected to the second control module, the first control module outputs a second group of control signals related to the on/off of the first control module, and the second control module receives the The second group of control signals.

Further, the first control module is connected to the second control module, the first control module can output a second control signal related to the on/off of the first control module, and the second control module receives the The second control signal.

Further, the parameters of the battery pack include a total voltage and a cell voltage, and the preset parameters include a preset total voltage and a preset cell voltage.

Further, the first switch module includes a MOS tube.

Further, the battery pack charging control device further includes a timing unit, and when the parameter of the battery pack collected by the second control module reaches a second preset value, the timing unit records the first time, when the When the first time reaches the preset time, the second control module turns off the second switch module.

Benefits:

The charging control device of the present invention not only includes a first control module, but also includes a second control module. The first control module and the second control module simultaneously monitor the battery pack; the first switch module is connected to the charging terminal and the battery pack, The first control module can realize the charging control of the battery pack through the first switch module, and the first switch module is connected in series with the second switch module, so that the second control module can realize the charging control of the battery pack through the second switch module; Either the first control module or the second control module detects that the battery pack is in an overcharged state. Both the first control module and the second control module can stop the battery pack from continuing to charge through its corresponding switch module, thereby reducing the battery pack length. The possibility of time being overcharged.

Description of the drawings

Fig. 1 is a schematic diagram of a battery pack charging circuit of an exemplary embodiment of the present invention;

Fig. 2 is a block diagram of circuit connections of a battery pack charging control device according to an exemplary embodiment of the present invention.

Detailed ways

The present utility model will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present invention, and the structural, method, or functional changes made by those skilled in the art based on these embodiments are all included in the protection scope of the present invention.

It should be understood that in the description of the specific embodiments of the present utility model, terms such as "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating what is indicated. The number of technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.

In the specific embodiments of the present invention, unless otherwise clearly specified and limited, terms such as "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a movable connection, or a detachable connection. Connected or integrated; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal communication between two elements or the interaction between two elements. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present utility model can be understood according to specific circumstances.

In the specific embodiments of the present invention, unless otherwise clearly defined and defined, the "upper" or "lower" of the first feature of the second feature may include direct contact between the first and second features, or include the first feature. The second feature is not in direct contact but is in contact with another feature between them.

In the specific embodiments of the present invention, unless otherwise clearly specified and limited, the term "multi" refers to two or more.

Please refer to Figures 1-2, the present invention provides a battery pack charging control device, including a battery pack 1, a first control module 2, a second control module 3, a first switch module 4, a second switch module 5 and Charging terminal 6.

The first switch module 4 is connected to the charging terminal 6 and the battery pack 1, and the first switch module 4 is connected to the first control module 2. The first control module 2 can collect and obtain the parameters of the battery pack 1, compare the reference of the battery pack 1 with preset parameters, and according to the result of the comparison, the first switch module 4 realizes the The charging control of the battery pack 1 is described. Specifically, the first control module 2 includes a battery management chip that can collect parameters of the battery pack 1, and compare the parameters of the battery pack 1 with preset parameters to generate a first Group control signal. The first set of control signals includes at least a first charging control signal and a second charging control signal; when the parameter of the battery pack 1 is not greater than the preset parameter, the battery management chip generates the first charging control Signal and realize the path of the first switch module 4 according to the first charging control signal; when the parameter of the battery pack 1 is greater than the preset parameter, the battery management chip generates the second charging control Signal, and realize the disconnection of the first switch module 4 according to the second charging control signal. In this embodiment, the battery management chip is specifically PT6007. Of course, in other embodiments, the battery management chip can also select other models that can collect battery pack parameters, which will not be repeated here. The battery management chip can collect the parameters of the battery pack in real time. The parameters of the battery pack include the total voltage of the battery pack and the cell voltage. Of course, in other embodiments, the parameters of the battery pack may also include the battery pack. Correspondingly, the preset parameters include preset total voltage, preset cell voltage, preset temperature, etc. It should be noted that in other embodiments, the first set of control signals may also include other charging control signals. For example, when the parameters of the battery pack are greater than the preset parameters, the battery management chip may also A charge control signal is generated to reduce the total voltage or real-time temperature of the battery pack, and other parameters, thereby reducing the risk of overcharging the battery pack 1. Meanwhile, in this embodiment, the first switch module 4 is specifically a MOS transistor. Of course, in other embodiments, the first switch module may also be other types of switches. Further, in other embodiments, the first control module may not be a battery management chip, but may be an acquisition circuit and a first control circuit, and the acquisition circuit may acquire the parameters of the battery pack. A control circuit can compare the parameters of the battery pack with preset parameters and generate the first set of control signals.

Please refer to FIG. 2 specifically. In this embodiment, the illustrated battery pack charging circuit is taken as an example to further illustrate the specific working principle of the charging control device. However, it should be noted that the illustrated battery pack charging circuit is only one type. In an alternative embodiment, in other embodiments, the charging control device may also be used in other charging circuits. When the parameter of the battery pack 1 collected by the battery management chip is not greater than the preset parameter, the battery management chip generates a first charging control signal, and realizes the path of the first switch module 4 according to the first charging control signal . Specifically in this embodiment, when the parameters of the battery pack 1 collected by the battery management chip are not greater than the preset parameters, the battery management chip outputs a high level to connect the transistor Q4, so that the resistor R5 is connected to the MOS transistor Q3 Connected, so that the MOS transistor Q3 is turned on. When the parameter of the battery pack 1 is greater than the preset parameter, the battery management chip generates the second charging control signal, and realizes the disconnection of the first switch module 4 according to the second charging control signal . Specifically, in this embodiment, when the parameter of the battery pack 1 collected by the battery management chip is greater than the preset parameter, the battery management chip outputs a low level to make the transistor Q4 disconnect, so that the resistor R5 It cannot communicate with the MOS transistor Q3, so the MOS transistor Q3 is disconnected.

Further, the charging control device further includes a second control module 3 and the second switch module 5 connected to the second control module 3. The second control module 3 can collect information about the battery pack 1 The total voltage is to compare the total voltage of the battery pack 1 with the preset total voltage in the preset parameters, and according to the comparison result, the second switch module 5 realizes the charging control of the battery pack 1. Specifically, the second control module includes a single-chip microcomputer that can collect the total voltage of the battery pack, compare the total voltage of the battery pack with a preset total voltage, and generate a third group of control signals. The third group of control signals includes at least a third charging control signal and a fourth charging control signal; when the total voltage of the battery pack 1 is not greater than the preset total voltage, the single-chip microcomputer generates a third charging control signal, And according to the third charging control signal, the path of the second switch module 5 is realized; when the total voltage of the battery pack 1 is greater than the preset total voltage, the single-chip microcomputer generates a fourth charging control signal, and according to the The fourth charging control signal realizes the disconnection of the second switch module 5. In this embodiment, the specific model of the single-chip microcomputer is HT45F0084, and the second switch module 5 is specifically a MOS tube. Of course, in other embodiments, the single-chip microcomputer may also select other models, and the second switch Module 5 can also select other types of switches. It should be noted that the second control module 3 only collects the total voltage of the battery pack 1 is only an embodiment. In other embodiments, the second control module 3 may also collect the total voltage of the battery pack 1. The cell voltage or the temperature of the battery pack 1 is collected.

Please refer to FIG. 2 again. When the total voltage of the battery pack 1 is not greater than the preset total voltage, the single-chip microcomputer generates a third charging control signal, and implements the second switch module 5 according to the third charging control signal. Access. Specifically in this embodiment, when the total voltage of the battery pack collected by the single-chip microcomputer is not greater than the preset total voltage, the single-chip microcomputer outputs a high level to connect the transistor Q2, so that the resistor R2 is connected to the MOS transistor Q1 to Therefore, the MOS transistor Q1 is turned on. When the total voltage of the battery pack 1 is greater than the preset total voltage, the single-chip microcomputer generates a fourth charging control signal, and the second switch module 5 is turned off according to the fourth charging control signal. Specifically, in this embodiment, when the total voltage of the battery pack collected by the single-chip microcomputer is greater than the preset total voltage, the single-chip microcomputer outputs a low level to disconnect the transistor Q2, so that the resistor R2 is connected to the The MOS transistor Q1 cannot be connected, so the MOS transistor Q1 is disconnected.

Further, the first switch module 4 is connected in series with the second switch module 5, so that either the first control module 2 or the second control module 3 detects that the battery pack 1 is in an overcharged state, Both the first control module 2 and the second control module 3 can stop the battery pack 1 from continuing to charge through their corresponding switch modules. Specifically, in this embodiment, when the single-chip microcomputer detects that the total voltage of the battery pack 1 is greater than the preset voltage, the single-chip can output a low level to turn off the MOS transistor Q1, so that the charging The circuit is open; when the battery management chip detects that the parameter of the battery pack 1 is greater than the preset parameter, the battery management chip outputs a low level to make the MOS transistor Q3 disconnect, so that the charging circuit Open circuit. In this way, when either the single-chip microcomputer or the battery management chip detects that the battery pack 1 is in an overcharged state, the charging circuit can be disconnected, thereby effectively preventing the battery pack 1 from overcharging.

Further, the first control module 2 is connected to the second control module 3. The first control module 2 can output a second set of control signals related to the on/off of the first control module 2. The second control module 2 can receive the second set of control signals, and the second set of control signals includes at least a fifth charging control signal. Specifically, in this embodiment, the second set of control signals is related to whether the first control module 2 is operating normally, that is, when the circuit of the battery management chip is connected, the battery management chip generates the fifth Charging control signal, the single-chip microcomputer can obtain the fifth charging control signal in real time and continue to work in the original working state; when the circuit of the battery management chip fails, the single-chip microcomputer cannot continue to receive the fifth charging Control signal. At this time, the single-chip microcomputer turns off the second switch module 5 to disconnect the charging circuit, thereby further reducing the risk of overcharging the battery pack 1. It should be noted that in other embodiments, the second set of control signals may also include a sixth charging control signal, that is, the battery management chip generates a fifth charging control signal and a sixth charging control signal at the same time, when When the single-chip microcomputer simultaneously receives the fifth charging control signal and the sixth charging control signal, it is determined that the battery management chip is working normally, and when the single-chip microcomputer cannot receive the second set of control signals simultaneously, the The single-chip microcomputer turns off the second switch module 5 to make the charging circuit open.

Further, the battery pack charging control device further includes a timing unit (not shown), and when the total voltage of the battery pack collected by the second control module 3 reaches a second preset value, the timing unit records At the first time, when the first time reaches a preset time, the second control module 3 turns off the second switch module 5. Specifically, in this embodiment, the timing unit is integrated in the single-chip microcomputer. Of course, in other embodiments, the timing unit may also be a separate module. When the total voltage of the battery pack collected by the single-chip microcomputer reaches the second preset value, the timing unit starts to record the first time. It should be noted that the second preset value is less than the preset in the preset parameters Total voltage. When the first time reaches the preset time, the single-chip microcomputer turns off the second switch module 5, thereby interrupting the charging of the battery pack 1, thereby reducing the risk of overcharging the battery pack 1. It should be noted that the second preset value is only slightly smaller than the preset total voltage, and the preset time is when the battery pack 1 is in a normal charging state, the total voltage of the battery pack is changed from the first Second, the time required for the preset value to increase to the preset total voltage.

It should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only includes an independent technical solution. This narration in the specification is only for clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions of the feasible implementation of the present utility model. They are not used to limit the scope of protection of the present utility model. Any equivalent made without departing from the technical spirit of the present utility model The implementation or modification should be included in the protection scope of the present invention.

Claims

A charging control device includes a first control module and a first switch module connected to the first control module. The first switch module is connected to a charging terminal and a battery pack. The first control module can collect and obtain the The parameters of the battery pack are compared with the preset parameters, and according to the comparison result, the charging control of the battery pack is realized through the first switch module, characterized in that the charging control The device further includes a second control module and a second switch module connected to the second control module, the second switch module is connected in series with the first switch module, and the second control module can collect and obtain the battery pack The parameters of the battery pack are compared with the preset parameters, and according to the comparison result, the charging control of the battery pack is realized through the second switch module.
The charging control device according to claim 1, wherein the first control module includes an acquisition circuit and a first control circuit, the acquisition circuit can acquire parameters of the battery pack, and the first control module The control circuit can compare the parameters of the battery pack with the preset parameters and generate a first group of control signals.
The charging control device according to claim 1, wherein the first control module comprises a battery management chip, and the battery management chip can collect and obtain the parameters of the battery pack, and convert the parameters of the battery pack Compare with the preset parameters, and generate a first set of control signals.
The charging control device according to claim 1, wherein the second control module comprises a single-chip microcomputer, and the single-chip microcomputer can collect the total voltage of the battery pack, and compare the total voltage of the battery pack with a preset The preset total voltage in the parameters is compared, and the third group of control signals is generated.
The charging control device according to claim 3, wherein the first set of control signals includes at least a first charging control signal and a second charging control signal; when the parameter of the battery pack is not greater than the preset When setting parameters, the battery management chip generates the first charging control signal, and realizes the path of the first switch module according to the first charging control signal; when the parameter of the battery pack is greater than the preset parameter At this time, the battery management chip generates the second charging control signal, and realizes the disconnection of the first switch module according to the second charging control signal.
The charging control device according to claim 4, wherein the third group of control signals at least includes a third charging control signal and a fourth charging control signal; when the total voltage of the battery group is not greater than the When the total voltage is preset, the single-chip microcomputer generates the third charging control signal, and realizes the path of the second switch module according to the third charging control signal; when the total voltage of the battery pack is greater than the preset When the total voltage is reached, the single-chip microcomputer generates the fourth charging control signal, and realizes the disconnection of the second switch module according to the fourth charging control signal.
The charging control device according to claim 1, wherein the first control module is connected to the second control module, and the first control module outputs the first control module on or off. Two sets of control signals, and the second control module receives the second set of control signals.
The charging control device according to claim 1, wherein the parameters of the battery pack include a total voltage and a cell voltage, and the preset parameters include a preset total voltage and a preset cell voltage.
The charging control device according to claim 1, wherein the first switch module comprises a MOS tube.
The charging control device according to claim 1, wherein the battery pack charging control device further comprises a timing unit, and the parameters of the battery pack collected by the second control module reach a second preset value When the timing unit records the first time, when the first time reaches a preset time, the second control module turns off the second switch module.